question_answer

If a plot of \[{{\log }_{10}}C\] versus t gives a straight line for a given reaction, then the reaction is

A)  zero order      

B)  first order

C)  second order   

D)  third order

Correct Answer: B

Solution :

 A graph between the log concentration, \[(\log C)\] of reactent and time t for the first order, reaction gives a straight line, whose slope is equal to \[-\frac{k}{2.303}\] \[{{\log }_{10}}\,{{C}_{A}}=-\frac{kt}{2.303}+{{\log }_{10}}{{({{C}_{A}})}_{0}}\] Hence, the order of the above reaction is one.